Soul Blight

(Magic of Incarnum, DnD 3.5)

Necromancy

Level: ; Assassin 2; Hexblade 2; Sorcerer/Wizard 2
Components: V, S, M
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Target: One creature
Duration: Instantaneous
Saving Throw: Will half
Spell Resistance: Yes

You rip away some of the target's personal essence, temporarily damaging the target's essentia pool.
You deal 1d4 points of essentia damage plus 1 additional point for every three caster levels, to a maximum of 1d4+3 points at caster level 9th.
Creatures that do not have essentia pools suffer no ill effects from this spell.
Material Component: A tiny crystal vial.